I'm curious about this (the effects of antibiotics), too. I have confirmed Grover's and was on antibiotics for more months than I counted, and then the doc took me off without explanation (I called but got no response), and it seems like the rash got worse. I assume they don't want to keep people on antibiotics forever; understandable; but I wish I felt like the docs knew what they were doing and cared enough to explain it to me.

I also want to throw in fwiw to others re- the shingrix vaccine, I developed Grover's before receiving the vaccine, and I've received both parts and did not notice any effects re- the Grover's.